The main raw material of steel doors and windows profiles is polyethylene resin, titanium dioxide, ultraviolet absorbers, processing modifiers, impact modifiers, internal and external lubricants and fillers need to be added before forming. Since the basic composition of the profile is polyvinyl chloride resin, there are some characteristics:
1. High machinability
In the molten state, the plastic has a relatively high fluidity, so that a precise cross-section structure can be formed through the mold, thereby realizing the functional requirements of the window. In addition, a partitioned chamber can be formed to improve the insulation, sound insulation, and drainage functions of the window, which can avoid the corrosion of the reinforced steel.
2. Energy saving
Plastic doors and windows have more superior technical characteristics than other doors and windows in terms of energy saving and improving indoor thermal environment. According to the Institute of Physics, Institute of Physics and Physics of China, the heat transfer coefficient of single glass steel and aluminum windows is 64W/M2K; the heat transfer coefficient of single glass steel window is about 47W/M2K; the heat transfer coefficient of ordinary double glass steel and aluminum windows. Is about 3. 7W/M2K; and double glass plastic steel window heat transfer coefficient is about 2. 5W/M2K. The doors and windows accounted for 30% of the area of ​​the building's external protective structure, and its heat dissipation accounted for 49%. It can be seen that the plastic steel windows have very good energy-saving benefits.
3. Soundproof
The soundproofing performance of steel-aluminum windows is about 19 decibels, and the sound-insulating performance of plastic-steel windows can reach 30 decibels or more. In an increasingly noisy urban environment, the use of steel windows makes the indoor environment more comfortable. According to information provided by Japan, to achieve the same noise reduction requirements, the distance between the building where the aluminum window is installed and the main road of the traffic must reach 50 meters, and the installation of plastic window can reach 18 meters. According to tests conducted by the Beijing Institute of Labor Protection, the use of plastic windows in the room dropped to 32 dB(A). The effect was very good. Due to the economic development, the problem of urban noise is getting more and more serious, and plastic steel windows will provide greater contributions to improving the sound environment quality of people living and working. In addition, plastic-steel windows are resistant to corrosion and can be used in corrosive environments such as coastal areas and chemical plants. Ordinary users can also reduce the labor and expense of painting maintenance.
4. Good appearance
Can meet the domestic requirements of decorative effects, and the human body feels more comfortable than metal. As the steel doors and windows have some outstanding advantages, they are being applied in a large number in China and become a new trend in the construction field.
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